| // Original implementation taken from rust-memchr. |
| // Copyright 2015 Andrew Gallant, bluss and Nicolas Koch |
| |
| pub fn memchr(needle: u8, haystack: &[u8]) -> Option<usize> { |
| let p = unsafe { |
| libc::memchr( |
| haystack.as_ptr() as *const libc::c_void, |
| needle as libc::c_int, |
| haystack.len()) |
| }; |
| if p.is_null() { |
| None |
| } else { |
| Some(p as usize - (haystack.as_ptr() as usize)) |
| } |
| } |
| |
| pub fn memrchr(needle: u8, haystack: &[u8]) -> Option<usize> { |
| fn memrchr_specific(needle: u8, haystack: &[u8]) -> Option<usize> { |
| core::slice::memchr::memrchr(needle, haystack) |
| } |
| |
| memrchr_specific(needle, haystack) |
| } |
